You must have a product key. SurfaceUnits This is an update. SaIvett There is a denial of access for a lot of cheap unlocks to the AT&T data base, that makes most of the 3rd party unlocking sites unable to unlock AT&T anymore. Watching DVDs requires separate playback software. April 12, 2014 Lowell Heddings You can actually use an OEM key with a retail DVD, you just might have to call Microsoft for phone activation. Microsoft also provides other software via the TechNet Evaluation Center. Google it. A user-friendly interface is provided with support for latest touch screen devices make this operating system compatible with all the latest devices. Unfortunately it doesn't look like there's a version for Windows 8/8.1, but there are apparently other ways of going about it. Though he's mostly a Windows and gadget guy, he has a fondness for anything tech.